\(n_{C_2H_4}=\dfrac{1,12}{22,4}=0,05mol\)

\(C_2H_4+H_2O\rightarrow\left(t^o,H_2SO_4\right)C_2H_5OH\)

0,05                                           0,05      ( mol )

\(C_2H_5OH+CH_3COOH\rightarrow\left(t^o,H_2SO_4\right)CH_3COOC_2H_5+H_2O\)

  0,05                                                               0,05                        ( mol )

\(m_{CH_3COOC_2H_5}=0,05.88=4,4g\)

\(n_{C_2H_5OH}=\dfrac{23}{46}=0,5\left(mol\right)\\a, PTHH:C_2H_5OH+3O_2\rightarrow\left(t^o\right)2CO_2+3H_2O\\ b,n_{O_2}=3.0,5=1,5\left(mol\right)\\ V_{O_2\left(đktc\right)}=22,4.1,5=33,6\left(l\right)\\ c,V_{C_2H_5OH}=46\%.100=46\left(ml\right)\\ C_2H_5OH+Na\rightarrow C_2H_5ONa+\dfrac{1}{2}H_2\\ n_{C_2H_5OH}=\dfrac{0,8.46}{46}=0,8\left(mol\right)\\ n_{H_2}=\dfrac{0,8}{2}=0,4\left(mol\right)\Rightarrow V_{H_2\left(đktc\right)}=0,4.22,4=8,96\left(l\right)\)

\(n_{CH_3COOH}=\dfrac{300\cdot5\%}{60}=0.25\left(mol\right)\)

\(2CH_3COOH+Zn\rightarrow\left(CH_3COO\right)_2Zn+H_2\)

\(0.25........................................................0.125\)

\(V_{H_2}=0.125\cdot22.4=2.8\left(l\right)\)

\(n_{C_2H_5OH}=0.1\cdot2=0.2\left(mol\right)\)

\(CH_3COOH+C_2H_5OH⇌CH_3COOC_2H_5+H_2O\left(ĐK:H_2SO_{4\left(đ\right)},t^0\right)\)

\(0.2......................0.2.....................0.2\)

\(\Rightarrow CH_3COOHdư\)

\(m_{CH_3COOC_2H_5}=0.2\cdot88=17.6\left(g\right)\)

a) n CH3COOH = 300.5%/60 = 0,25(mol) 

Zn + 2CH3COOH $\to$ (CH3COO)2Zn + H2

Theo PTHH :

n H2 = 1/2 n CH3COOH = 0,25/2 = 0,125(mol)

V H2 = 0,125.22,4 = 2,8(lít)

b) n C2H5OH = 0,1.2 = 0,2(mol)

\(CH_3COOH + C_2H_5OH \buildrel{{H_2SO_4,t^o}}\over\rightleftharpoons CH_3COOC_2H_5 + H_2O\)

Ta thấy :

n CH3COOH = 0,25 > n C2H5OH = 0,2  => CH3COOH dư

n CH3COOC2H5 = n C2H5OH = 0,2 mol

=> m CH3COOC2H5 = 0,2.88 = 17,6 gam

- Đặt \(\left\{{}\begin{matrix}n_{C_2H_5OH}=a\left(mol\right)\\n_{CH_3COOH}=b\left(mol\right)\end{matrix}\right.\) \(\Rightarrow46a+60b=33,2\left(1\right)\)

\(n_{H_2}=\dfrac{V}{22,4}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)

a) \(2C_2H_5OH+2Na\rightarrow2C_2H_5ONa+H_2\)

       2                                      2             1     (mol)

       a                                      a           a/2   (mol)

\(2CH_3COOH+2Na\rightarrow2CH_3COONa+H_2\)

      2                                       2                    1    (mol)

     b                                        b                b/2  (mol)

Từ hai PTHH trên ta có: \(\dfrac{a}{2}+\dfrac{b}{2}=n_{H_2}=0,3\Rightarrow a+b=0,6\left(2\right)\)

(1), (2) ta có hệ phương trình: \(\left\{{}\begin{matrix}46a+60b=33,2\\a+b=0,6\end{matrix}\right.\)

Giải ra ta được: \(a=0,2\left(mol\right);b=0,4\left(mol\right)\)

b) \(m_{C_2H_5OH}=n.M=0,2\times46=9,2\left(g\right)\)

\(m_{CH_3COOH}=n.M=0,4\times60=24\left(g\right)\)

c) \(m_{C_2H_5ONa}=n.M=0,2\times68=13,6\left(g\right)\)

\(m_{CH_3COONa}=n.M=0,4\times82=32,8\left(g\right)\)

a) 

C2H5OH + Na → C2H5ONa + 1/2 H2

CH3COOH + Na → CH3COONa + 1/2 H2

b)

Theo PTHH :

n C2H5OH = a(mol) ; n CH3COOH = b(mol)

=> 46a + 60b = 12,9(1)

n H2 = 0,5a + 0,5b = 2,8/22,5 = 0,125(2)

Từ (1)(2) suy ra a = 0,15 ; b = 0,1

%m C2H5OH = 0,15.46/12,9  .100% = 53,49%

%m CH3COOH = 100% -53,49% = 46,51%

b)

n C2H5ONa = a = 0,15 mol

n CH3COONa = b = 0,1(mol)

=> m muối = 0,15.69 + 0,1.82 = 18,55 gam

Câu 2:

V(C2H5OH)= 2 x 30/100= 0,6(l)

=> V(H2O)=V(H2O,C2H5OH) - V(C2H5OH)=2-0,6=1,4(l)

=> Cách pha: Rót thêm 1,4 lít nước vào 0,6 lít C2H5OH ta sẽ được 2 lít rượu etylic 30^o

Câu 1 : 

\(n_{CH_3COOH}=\dfrac{200\cdot12\%}{60}=0.4\left(mol\right)\)

\(2CH_3COOH+CaCO_3\rightarrow\left(CH_3COO\right)_2Ca+CO_2+H_2O\)

\(0.4........................0.2................0.2..................0.2\)

\(m_{CaCO_3}=0.2\cdot100=20\left(g\right)\)

\(V_{CO_2}=0.2\cdot22.4=4.48\left(l\right)\)

\(m_{\left(CH_3COO\right)_2Ca}=0.2\cdot158=31.6\left(g\right)\)

Câu 1:

mCH3COOH=200.12%=24(g) -> nCH3COOH=0,4(mol)

PTHH: 2 CH3COOH + CaCO3 -> (CH3COO)2Ca + H2O + CO2

0,4_______________0,2_________0,2__________________0,2(mol)

=> V(CO2,đktc)=0,2.22,4=4,48(l)

a=mCaCO3=0,2.100=20(g)